2865565 has 8 divisors (see below), whose sum is σ = 3452760. Its totient is φ = 2283072.

The previous prime is 2865559. The next prime is 2865581. The reversal of 2865565 is 5655682.

It can be written as a sum of positive squares in 4 ways, for example, as 6084 + 2859481 = 78^2 + 1691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2865565 - 2³ = 2865557 is a prime.

It is a super-2 number, since 2×2865565² = 16422925538450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 8⁴ + 6 + 5⁶ + 5⁷ + 6⁷ + 5⁸ .

2865565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351 + ... + 2419.

It is an arithmetic number, because the mean of its divisors is an integer number (431595).

2^2865565 is an apocalyptic number.

It is an amenable number.

2865565 is a deficient number, since it is larger than the sum of its proper divisors (587195).

2865565 is a wasteful number, since it uses less digits than its factorization.

2865565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351.

The product of its digits is 72000, while the sum is 37.

The square root of 2865565 is about 1692.7979796774. The cubic root of 2865565 is about 142.0376313674.

The spelling of 2865565 in words is "two million, eight hundred sixty-five thousand, five hundred sixty-five".